Gas-liquid contacting apparatus

ABSTRACT

A gas-liquid contacting apparatus provided with vertically spaced trays having gas flow aperture therein and a contacting structure provided on the trays surrounding the gas flow aperture. The contacting structure has a cover for preventing gas and liquid to ascending and a perforated plate for breaking gas and liquid mixing flow therein.

[ Dec. 18, 1973 United States Patent 1191 Tanigawa et al.

261/114A 261/114A 261/114R 261/114 A 1 GAS-LIQUID CONTACTING 2,778,6211/ 1957 Zimmerman, Jr. APPARATUS 2,819,049 1/1958 Manning, Jr. et al..3,633,882 1/1972 Karakawa et a1. 1 Inventors: shogo anigaw Takesi yama.3,693,948 9/1972 both of Tamano; Kouichi Karakawa, Toyama, all of JapanPrimary ExammerTrm R. Miles Assigneei Mnsui Shipbuilding and EngineeringAssistant ExaminerSteven H. Markowitz Ltd-,Tokyo, Japan Attorney-DexterN. Shaw et a1. [22] Filed: Aug. 19, 1971 Appl. No.: 173,080

ABSTRACT 0 261/114 R, 55/257 A gas-liquid contacting apparatus providedwith verti- B0 M 3/26 cally spaced trays having: gas flow aperturetherein and a contacting structure provided on the trays surrounding thegas flow aperture. The contacting structure has Field of Search.........

261/114 VT, 114 JP; 55/223, 240, 255-257 a cover for preventing gas andliquid to ascending and a perforated plate for breaking gas and liquidmixing flow therein.

3 Claims, 5 Drawing Figures 410,634 /1889Bolton..............;.............. 261/114 R PMENTEU DEC 1 8 I975 SHEET10F 2 3 779525 18815 minnow; SHEET w 2 V llllll GAS-LIQUID CONTACTINGAPPARATUS The present invention relates to a gas-liquid contactingapparatus for heat or mass transfer such as distillation apparatus orabsorption apparatus in the chemical industry.

An object of the present invention is to provide a gas- 7 liquidcontacting apparatus which has high contacting efficiency despite ofsimple construction.

To this end, the gas-liquid contacting apparatus in accordance with thepresent invention comprises a gasliquid contacting structure surroundinga gas flow opening provided on the tray and a perforated breaking plateis provided in the structure.

In the drawings;

FIG. 1 is a vertical sectional view of one embodiment of the presentinvention;

FIG. 2 is a sectional view taken on line 22 in FIG.

FIG. 3 is a vertical sectional view showing another embodiment of thepresent invention;

FIG. 4 is a sectional view taken on line 44 in FIG. 3; and

FIG. 5 is a vertical sectional view showing a further another embodimentof the present invention.

Referring to the drawings and particulary to FIGS. 1

flows in the direction of the arrow-a," enters into the room B andcontacts again with the gas in the room. Thereafter the liquid flowsfrom the room B and down through the downcomer 16. It will be observedthat the gas-liquid mixing flow is broken or scattered by the perforatedplate 18 so that the contacting area of the liquid with gas is increasedand thereby contacting effect is enhanced.

The gas-liquid contacting structure in the apparatus shown in FIGS. 3and 4 comprises a perforated cylinder 14a instead of the stays 14 inpreviously described embodiment. Other parts thereof are identical withthat of previous embodiment, and duplicate reference characters beingused to identify similar parts. This apparatus has more effectivegas-liquidcontact than previous embodiment, because the perforatedcylinder 14a is employed to form the gas-liquid contacting structure andthereby gas and liquid being remained in the structure for longer periodthan previous embodiment.

The gas-liquid contacting structure shown in FIG. 5 has a perforatedcylinder 21 as breaking plate. This apparatus has a plurality ofperforations 22 instead of slots 20 shown in FIG. 1 and is not providedwith the partition plate 17 in FIG. 1. It will be observed that thisapparatus has similar advantages to that of above described apparatus.

and 2, trays 12 each having an aperture 11 at a central portion thereofare'provided in a column 10 at a suitable space. Each tray 12 isprovided with a gas-liquid contacting structure. The gas-liquidcontacting structure comprises a cylindrical weir plate 13 surroundingthe aperture 11 and having a plurality of slots 20 adjacent the tray 12,and a cover 15 supported on the weir plate 13 by stays 14. Each tray 12is also provided with a downcomer 16 at the outside of the structure,the downcomer projecting upwardly from the tray to maintain liquidthereon at a predetermined depth, and the lower end of the downcomerbeing near the lower tray. Each downcomer is arranged in alternatelydiametrically opposite position at every tray. In the gas-liquidcontacting structure, a partition plate 17 is provided at p a righ anglewith the flowing direction of the liquid on the tray indicated by thearrow a in FIG. 2. A perforated breaking plate 18 is secured to thelower end of the partition plate. .1 v

Liquid on the tray 12 overflows the weir formed by the downcomer 16 andflows down along the inside wall therof. Liquid is maintained on thetray at a level determined by height of the weir, passes through theslots 20 of the cylindrical weir plate 13 to the inside of thecontacting structure and flows toward the aperture 11 of the tray by thehead of liquid on the tray. Liquid having passed over the edge of theaperture 11 is blown up by ascending gas through the aperture withoutfalling down through the aperture. Thus the liquid and gas are formedinto the gas-liquid mixing flow. The gasliquid mixing flow ascendsthrough the perforated plate 18 by which the flow is broken orscattered. Further the ascending flow is diverted by the cover 15.Thereby the gas-liquid mixing flow flows from the structure. Liquidseparated from the flow falls on the pool maintained on the tray and gasascends to the next uppercontacting structure. 1 Y

The partition plate l7divides the room. in the structure into A and B,the liquid separated in the room A can not flow into the room B owing.the partition plate. Thus the liquid fallen from the room A on the poolWe claim:

I-. A gas-liquid contacting apparatus comprising an upright column inwhich the gas flows upwardly, at least one tray mounted transversely insaid column and having means for maintaining liquid thereon at apredetermined depth and a gas-flow opening therein, upwardly throughwhich the gas is adapted to flow, contacting structure surrounding saidopening comprising a wall projecting upwardly from said tray and havingapertures at a lower position below said predetermined depth of liquidto permit discharge of the liquid from the tray therethrough, aperforated plate disposed horizontally above the predetermined depth ofliquid on said tray and overlying said gas-flow opening in said tray topermitgas flow therethrough, said structure being designed so that theliquid from said tray discharged throughsaid apertures is blown up bythe gas ascending through the gas-flow opening of the tray, the

posed transversely desired gas-liquid contact being effected below saidperforated plate above said gas-flow opening, and a cover above saidperforated plate to prevent gas and liquid passing through'said platefrom ascending.

2. A gas-liquid contacting apparatus according to claim 1 including avertical partition disposed over said gas-flow opening between saidperforated plate and said cover.

3. A gas-liquid contacting apparatus according to claim 2 including aseries of trays mounted transversely v to said flow.

v UNITED STATES PATENT 'OFFI-CE CERTIFICATE OF CORRECTION Patent No 3779,525 Dated December 18- 197g Inventor(s) Shogo Tanigawa et a1 It iscertified that error appears in the above-identified patent and thatsaid Letters Patent are hereby corrected as shown below:

In the heading before [52] 'U.S. 'Cl. the following should be added![30] Foreign Application Priority Data Aiugust 2l, 1970 Japan......'.8372l/l970 I August 24, 1970 1 Japan; .84104/1970 Signed and sealedthis 6th day of August 1974.

(SEAL) Attest:

MCCOY M. GIBSON, JR. c. MARSHALL DANN Attesting Officer Commissioner ofPatents FORM PO-1050 (10 69) USCOMM'DC 60376-P69 i 11.5. GOVERNMENTHUNTING OFFICE I969 O-JGG-38l,

1. A gas-liquid contacting apparatus comprising an upright column inwhich the gas flows upwardly, at least one tray mounted transversely insaid column and having means for maintaining liquid thereon at apredetermined depth and a gas-flow opening therein, upwardly throughwhich the gas is adapted to flow, contacting structure surrounding saidopening comprising a wall projecting upwardly from said tray and havingapertures at a lower position below said predetermined depth of liquidto permit discharge of the liquid from the tray therethrough, aperforated plate disposed horizontally above the predetermined depth ofliquid on said tray and overlying said gas-flow opening in said tray topermit gas flow therethrough, said structure being designed so that theliquid from said tray discharged through said apertures is blown up bythe gas ascending through the gasflow opening of the tray, the desiredgas-liquid contact being effected below said perforated plate above saidgas-flow opening, and a cover above said perforated plate to prevent gasand liquid passing through said plate from ascending.
 2. A gas-liquidcontacting apparatus according to claim 1 including a vertical partitiondisposed over said gas-flow opening between said perforated plate andsaid cover.
 3. A gas-liquid contacting apparatus according to claim 2including a series of trays mounted transversely in said column invertically-spaced relation, said means for maintaining the liquid at apredetermined level upon each tray including downcomer means to transferliquid from an upper tray to the next lower tray and arranged so thatthe gas does not flow upwardly through said downcomer means, saiddowncomer means for the next lower tray being positioned at the oppositeside of the column from the downcomer means for the upper tray, wherebythe liquid is directed to flow across said tray from said upperdowncomer means to said next downcomer means, said vertical partitionbeing disposed transversely to said flow.